7 - portable extinguishers PDF

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practice test questions on portable fire extinguishers...

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FGO1106

Quiz #7

1. If a private residence has a single fire extinguisher, where should it be located? A. Garage B. Near the bedrooms C. Kitchen D. Laundry area

2. What is an advantage of portable fire extinguishers over hose lines? A. Greater heat absorption B. Controllable rates of flow C. Longer duration D. Faster deployment

3. Which class of fire includes cloth? A. A B. B C. C D. D

4. What is the most commonly used extinguishing agent for Class A fires? A. Water B. Ammonium phosphate C. Dry chemical D. Potassium bicarbonate

5. Which class of fire involves energized electrical equipment? A. A B. B C. C D. D

6. Which extinguishing agent is suitable for use on a Class C fire? A. Carbon tetrachloride B. Carbon dioxide C. Dry powder D. Aqueous film-forming foam (AFFF)

7. The traditional symbol for a Class D fire extinguisher is a(n): A. orange circle. B. blue square. C. yellow star. D. green triangle.

8. Which class of fire extinguisher includes a number in its classification? A. A B. C C. D D. K 9. A Class C extinguisher is rated for use on: A. radioactive materials involved in flame. B. energized electrical equipment. C. combustible metals. D. cooking oil.

10. What does it mean when a fire extinguisher has a pictograph with a red slash through it? A. It would be ineffective to use the fire extinguisher on that class of fire. B. It would be unsafe to use the fire extinguisher on that class of fire. C. The fire extinguisher has not been tested for use on that class of fire. D. The fire extinguisher is rated for use on that class of fire.

11. Which is a primary factor when determining hazard classification for extinguisher selection and placement? A. Permissible occupancy load B. Construction type C. Presence of a sprinkler system D. Amount of combustibles present

12. To qualify as a light hazard for the purpose of extinguisher selection and placement, the majority of materials in the area must: A. be fire resistive. B. be Class A or C combustibles. C. have a flash point exceeding 66°C (150°F). D. have low combustibility.

13. For the purpose of extinguisher selection and placement, light hazard environments may contain a limited amount of combustibles of which class? A. K B. B C. C D. D

14. For the purpose of extinguisher selection and placement, what is an example of a light hazard environment? A. Self-storage building B. Classroom C. Parking garage D. Restaurant kitchen

15. Which is one of the three basic components required for fire? A. Ignition source B. Catalyst C. Carbon D. Oxygen

16. Combustion begins when a fuel is heated to its: A. flash point. B. lower flammable limit. C. fire point. D. ignition temperature.

17. For an extinguishing agent to be approved for use on energized electrical equipment, it must: A. not conduct electricity. B. leave no residue. C. be non-corrosive. D. be safe for use in a closed room.

18. Dry chemical extinguishers may be used on Class C fires because they: A. are chemically inert. B. do not conduct electricity. C. are noncorrosive. D. leave no residue.

19. Which is a common dry chemical extinguishing agent? A. Calcium bicarbonate B. Carbon tetrachloride C. Potassium hydrate D. Potassium chloride

20. What is the term for a water-soluble flammable liquid? A. Hypergolic fuel B. Polar solvent C. Solute D. Miscible liquid

21. Which statement about the numerical rating of a Class K extinguisher is correct? A. There is no numerical rating for a Class K extinguisher. B. The numerical rating indicates the relative extinguishing power of the agent. C. The numerical rating indicates the relative duration of the agent. D. A numerical rating is required for commercial hood systems.

22. All portable fire extinguishers use which means for expelling their contents? A. Volume B. Vacuum C. Pressure D. Gravity

23. What residue does a CO2 fire extinguisher leave when discharged? A. Carbon B. Iron oxide C. Mineral salt D. None

24. In general, the maximum discharge range of a CO2 extinguisher is: A. 10 m (33 ft). B. 5.6 m (18 ft). C. 2.4 m (8 ft). D. 1.5 m (5 ft).

25. Which test is used to measure the ability of an extinguisher cylinder to withstand steady internal pressure? A. Static B. Pneumatic C. Fatigue D. Hydrostatic

26. The production and use of Halon extinguishing agents is limited because they are: A. mutagenic. B. harmful to the earth’s ozone layer. C. chemical asphyxiants. D. carcinogenic.

27. Bromochlorodifluoromethane is a _________ agent. A. halon B. wet chemical C. Class D D. multipurpose dry chemical

28. What is the difference between dry powder and dry chemical extinguishing agents? A. There is no difference. These are two different terms for the same thing. B. A dry powder is compatible with foam; a dry chemical is not. C. A dry powder is harmful to the environment; a dry chemical is not. D. Each is rated for a different class of fire.

29. Which extinguishing agent is approved for use in a Class K system? A. Wet chemical B. Aqueous film-forming foam C. Carbon dioxide D. Dry chemical

30. A portable fire extinguisher is best suited for which situation? A. Car fire B. Room and contents fire C. Fire in a wastebasket D. Vegetation fire

31. Which substance is commonly used to pressurize a stored-pressure water extinguisher? A. Compressed air B. Argon C. Water D. Carbon dioxide

32. All fire extinguishers are classified according to: A. the net weight of their contents. B. their relative extinguishing power. C. the classes of fire on which they are safe and effective. D. the type of extinguishing agent used.

33. Class D agents work primarily by: A. penetrating the fuel. B. forming a crust over the fuel. C. suppressing vapour production. D. inhibiting the chemical chain reaction.

34. Which part of a fire extinguisher contains the extinguishing agent? A. Cartridge B. Horn C. Chamber D. Cylinder

35. What does a rating of 40 on a Class B extinguisher mean? A. BTU absorption comparable to 150 L (40 gallons) of water B. Sufficient extinguishing power for 3.7 m2 (40 ft²) of burning fuel C. Sufficient extinguishing power for 150 L (40 gallons) of burning fuel D. Discharge duration of at least 40 seconds...